91738568216 has 32 divisors (see below), whose sum is σ = 178570083600. Its totient is φ = 44131059840.

The previous prime is 91738568203. The next prime is 91738568267. The reversal of 91738568216 is 61286583719.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 632975 + ... + 764286.

Almost surely, 2^91738568216 is an apocalyptic number.

It is an amenable number.

91738568216 is a deficient number, since it is larger than the sum of its proper divisors (86831515384).

91738568216 is a wasteful number, since it uses less digits than its factorization.

91738568216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1397579 (or 1397575 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 56.

The spelling of 91738568216 in words is "ninety-one billion, seven hundred thirty-eight million, five hundred sixty-eight thousand, two hundred sixteen".